Lubricating nozzle



May31,1938. F, HLEH'NTS Re. 20,743

LUBRICATING NOZZLE Original Filed Feb. 5, 1936 kann Ms 31, 193s t Re. 20,743

UNITED sTATEs PATENT oFFicE Fred. Henry Ehnts, Lansdowne, Pa.

original No.' 2.o5s,219, ameri october zo, 193e,

serial No. 62.430, February s. 193e. Appunt-l tion for reissue February 5, 1938, Serial No. 188,861

1s claims. (ci. 2214414) My invention relates generally to greasing or vrangement andorganization of-the instrumenlubricating apparatus and more particularly to talities as herein shown and dcribed.

improvements in back-pressure inditing iit- My invention relates to several other novel tings or nozzles through which grease is disfeatures of construction and advantage appear- 5 charged into bearings. ing as hereinafter described and claimed in con- 5.

One of the objects of my invention is to pronection Ywith the accompanying drawing, in vide a tting or nozzle that 'may be readily apwhich! l plied to the illling vent of a bearing housing Figure 1 represents on a reduced scale the fitfor 4the purpose of filling the bearing with the* ting 0r nozzle of my invention attached to a l required quantity of grease at a predetermined grease gunand a desirable operating pressure. Fig. 2 represents a section taken on the plane In the specialized ileld of bearing lubrication, 0f the line 2-2 oi' F18. 1- the practice has been heretofore to inject the Fig- 3 represents an axial sectional view greaseintp a bearing under pressure without a through the fitting Shown in Fig- 1- .l means of ascertaining whether the pressure is Referring to the drawing. in which like rei'- 15 adequate or excessive.. Not infrequently the erenee eheraoters indicate like parts, `l is a zealous operator in a spirit of excess caution fills length oi metal tubing which iS attached at one the bearing with grease under too great apres'- end through' a universal Joint 2 to a metering sure, and thereby may unknowingly be supplying or measuring grease Kun 3. At the other end 2 0 the cause of a bearing failure. It is now recogthe tube engages threededly with the 65D 4'20 nized that space must be allowed for normal exwhich threadedly engages with the orifice elepansion of grease which occurs due to speed and ment 5'- The Cap l is perforated With 8 Pluoperating temperature, otherwise overheating of rlity oi' holes` 5. Constant in diameter and disthe bearing will occur. Overlubrication under r tributed uniformly on. e circumference concenhigh pressure may even prevent the balls'or rolls trio With the external periphery of the cap 4- 25 in a bearing from revolving, thus causing scufr- The orice element 5' approximates in shape ing and permanent injury to the bearing. and contour a truncated hollow cone with its My invention avoids the hazards of direct pres- Smaller Opening 5v adapted to enter for a Short sure greasing 4by indicating in a visible manner distance the llins vent 'l of the bearing hous- :zol when the bearing is oiled with the required' ins e. The base or the larger opening 9 of the 3o quantity ofgrease under a proper' pressure, orifice elementi' is threaded'to engage the cap Another object of my invention is to provide l- Over the tube l and bearing 0n the oep l iS a tting (nozzle) that will indicate to the operthe perforated washer l0. the holes II of which ator any irregular or unanticipated obstruction are distributed on a circumference that coin- #5 existent in the bearing -that may be caused by cides with a similar circumference on the cap I 35 solidified grease or other factors. Should the but the diameters of which Vary Slightly between bearing really require greasing a'nd, neverthe Close limits. The Washer lil can be rotated less, the nozzle expels grease from its rear sur- 'freely about the tube l and. aeeordinlYL/een/be face when the gun discharges grease into the Set in indefinite number 0f poeitionafelatively 40 bearing, the operator is immediately apprised of to the perforations in the cap 4, rangingfrom a 40 a defective condition in the'bearing that may position in which all 0f the Derforations are be imputable to a number of causes, closed to a position in which all of the afore- A further object of my invention is to prosaid perforations are open. 'I'he lock nut I2 vide a nozzle that can be readily adjusted to threaded to engage the tube l Serves to hold serve as a direct high pressure-discharging nozsecurely the Washer l0 in any predetermined 45l zle to be attached to a pressure gun of either relation-hill With the oop 4 the continuous or intermittent feeding type. A thin Walled Cylindrical tube i3 iS fitted Suus- For thel purpose of illustrating my invention lyinto the smooth bore of the threaded end of I` have shown in the accompanying drawing a the tubel and is adjustable-in that its end Il form thereof which has been found in practice to can be advanced toward vor withdrawn from the 50 give satisfactory and reliable results, although smaller end of the oriiice element S'to the by it is to be understood that the various instru' vary the restricted opening between thl end mentalities of which my invention consists can I 4 of the tube I3 and the enclosing wall/oi' the be variously arranged and organized and that orice element 5'. It the distanceAis decreased,

- myinvention is not limited to the precise arthen the area of the restricted opening above 58 -v creased.

which the grease will be expelled from the bearing l is increased; and if thevdlstance A Isincreased,'then the area of the restricted opening 'f is increased and the pressure at which grease will be' expelled from the 'bearing will be de- 'Ihe area of the restricted opening between the end Il of the tube I3v and the wall of the orifice element adjacent the discharge end thereof determines the pressure at which the grease in the bearing will back up and be expelled through the openings i in the cap l and thereby provide a telltale or indication that the bearing has an adequate amount of grease therein.

The manner in which my device can b`e utilized becomes obvious when its operation is more fully` described. The grease gun I is of the metering or measuring type and with every release of its trigger a definite quantity of grease, approximately .07 oz., is discharged, as indicated by the solid arrow, through the orifice element opening l into the filling vent I-of the bearing l. For lubrieating-a bearing where excessive pressure is to be avoided, the washer Il is rotated to such a degree that its holes I l coincide with the perforations i of the cap I, thus affording a plurality of unob-` structed passageways throughout the enlargedV end of the nozzle and adjusting the restrictive opening adjacent the discharge end of the nomle to establish a predetermined low pressure'for the grease in the bearings. When a sufficient quantity of grease has been admitted to the bearing l and the pressure therein builds up to exceed that governed by the restrictive opening, then the excess greas is expelled along .the paths indicated by the broken arrows of Fig. 3 through the perforations I and Il, indicating immediately to the :operator that the bearing l has been correctly and adequately greased. Experience has determined that a pressure of 1.5 to 3 ounces upon the grease in a bearing is ample for most purposes. i

'Ihe universal joint I attaching the nozzle to the gun 3 enables the operator to apply grease to bearings that are situated in awkward or comparatively inaccessible places.

Should the operator desire, he can quickly release the lock nut I2, rotate'the washer llin such a manner that the perforations l. are closed, and proceed to use the nozzle on any type of grease gun as an ordinary high pressurefitting.

What I claim is:

1. A nozzle comprising an orifice element incombination with a tube in adjustable relationf ship with said 'orifice element., a perforated cap adapted to engage with said orince element, a delivery tube adapted to engage with said perforaty ed cap, a perforated washer and a lock nut adapted to engage with said delivery tube.

2. A nozzle ,adaptable to a metering gun com- 'prising an orlce element in combination with a tube in adjustable relationship with said orifice element, a perforated cap adapted to engage with said orifice element, a delivery tube adapted to engage with said perforated cap, a perforated washer and a lock nut adapted to engage with said delivery tube.

3. A nozzle adaptable to a metering gun serving the function of indicating excessive pressure of grease in a bearing lubricated by the said metering gun and comprising an orice element in combination with-.a tube in adjustable relationship with said orince element, a perforated cap adapted to engage with said oriilce element, a delivery tube adapted to engage withV said perfo- 80,748 referred to is decreased andthe pressure at rated cap, a perforated washer and a lock nut adapted to engage-with said delivery tube.

4. A nozzle adaptable to a pressure gun comprising an orice element in combination with a tube in adjustable relationship with said orifice element, aperforated cap adapted to engage with 'said orifice element, a delivery tube adapted to engage with said perforated cap, a perforated washer and a lock nut adapted to engage with said delivery tubeand to close said perforated 5. A lubricating Vfitting comprising a-member having an intake opening adapted i'or engagement with a lubricant supply means, a discharge opening adapted for engagement with a member for receiving! lubricant yunder pressure, and an unobstructed opening extending from a point adjacent the discharge opening rearwardly through -the wall of the member to the exterior thereof.

6. A lubricatingtting comprising a member having a passage therethrough and a housing enclosing said member adapted for engagement with a member for receiving lubricant under pressure through said passage, said housing havlngan unobstructed opening through the wall thereofA rearwardly of the discharge passagetherein normally establishing communication betw'een the discharge end of said passage and the exterior yof the housing when the tting is in lubricant supplying Arelation to the lubricant' receiving member.

7. A lubricant. tting comprising a member having a therethrough and a housing enclosing said-member adapted for engagement with a member for receiving lubricant under pressure through said passage, said housing having a chamber surrounding the'discharge end of said e and being in open communicationtherewith, and an opening through a'wall of the housing rearwardly of the discharge end thereof leading from the chamber to the exterior of the housing.

8. A iitting of the type described, comprising a casing having receiving means for engagement with a source of viscous material, means for engagement with a member for receiving the viscous material upon discharge from the casing under pressure, the casing having an opening through the wall thereof rearwardly of the discharge passage therein providing open communication between the interior of thev casing and the exterior thereof for permitting the escape of viscous material from the casing when the pressure of the viscous material vin the receiving member exceeds a predetermined pressure.

9. A fitting of the typedescribed, comprising a casing having receiving means for engagement with a source of viscous material, a tubular element within said casing in open communication with said receiving means, the discharge end of said tubular element being in spaced relation to the discharge end of the casing, means for engagement of the casing with a member for receiving the viscous material upon discharge from the tting under pressure, and said casing having an opening through a wall thereof rearwardly of the discharge end of the tubular element providing open communication between the interior of the casing andthe exterior .thereof adapted to permit the escape of viscous material therethrough from the casing when the pressure of said viscous material in the receiving chamber exceeds a predetermined pressure.

10. A tting of the type described, comprising a casing having receiving' means for engagement 20,743 :with a source of viscous material, a tubular element within said casing in open communicatimA with said receiving means, the discharge end oi'*A said tubular element terminating rearwardly of,-

, material upon discharge from the iltting under pressure, and said casing having an opening through a wall thereof rearwardly of the discharge end of the tubular element providing open com- I munication between the interior oi the casing and the exterior thereof ior permitting the escape of viscous material therethrough'from the casing when the pressure of said viscous material in the receiving chamber exceeds a predetermined pressure. Y p A 11. A iltting oi' the type described, comprising a casing having receiving means for engagement with a source of viscous material, a tubular element within said casing in open communication with said receiving means, the discharge end of said tubular element being in spaced relation to the discharge end of the casing and being adjustable with relation thereto to vary the radial distance between the opposed walls thereof, means for engagement with a member for receiving the viscous material upon discharge from the casing under pressure, and said casing having an opening therein providing opencommunication between the interior of the casing and the exterior thereof. s

12. A iltting of the type described, comprising a casing having receiving means for engagement with. a source of -viscous material, a tubular e'lement within said casing in open communication with said receivingmeans, the discharge end of said tubular element being in spaced relation to the discharge end of the casing, one of the opposed walls on the tubular element and on the casing at the discharge end' of the fitting being oi' substantially conical form, and the tubular element being axially adjustable with relation to the casing to vary the radial distance between said opposed walls adjacent the discharge end oi' the casing, means for engagement ot the casing with a member for receiving vthe viscous material upon discharge tromthe casing under pressure, and said casing having an opening therein rearwardly of the discharge end thereof providing open communication between the interior oi' the casing and the exterior oi' the casing.

i3. A telltale iltting for indicating when viscous lubricant supplied to a bearing has reached a predetermined pressure therein, comprising a hollow casing having a discharge end adapted for engagement with the housing oi the bearing to be lubricated. a tubular element within said casing, one end of said tubular element beingadapted i'or connection with a source of lubricant and the other end being in spaced relation to the discharge end o! the casing and providing therewith a restricted .opening between the opposed walls of said members adjacent said discharge end, and

the casing having an opening through 'a wall thereof rearwardly ci' said discharge end oi the tubular element providing open communication between the restricted opening at the opposed walls and the exterior of the casing. 14. A tting ofthe type described, comprising a casing having receiving means for engagement with a source of viscous material, a tubular element within said casing in open communication with said receiving means, the discharge end of said tubular element terminating in proximity to the discharge end of the casing and being in radially spaced relation to that portion of the casing which is in proximity to said discharge,y end of the tubular element, said tubular element being axially Aadjustable to vary the distance between the discharge end thereof and the discharge end of the casing, means for engagement with a member for receiving the viscous material upon discharge i'rom the casing under pressure, and said casing having an lopening therein providing open communication between the interior of the cas ing and the exterior thereof.

15. A telltale fitting for indicating when viscous lubricant supplied to a bearing has reached a predetermined pressure therein, comprising a hollow casing having a discharge end adapted for engagement with the housing of the bearing to be lubricated, a tubular element within` said casing, one end of said tubular element being adapted for connection with a'source of lubricant and the other end being in spacedI relation to the discharge end of the casing and providing therewith a restricted opening between the opposed walls ot said members adjacent said discharge end, the casing having an opening through a wall thereof rearwardly of said discharge end of the tubular element providing open communication between the restricted opening at the opposed walls and the exterior oi the casing, and a member having an opening therein for adjustable registry with the opening in the wall of the casing to vary they eii'ective area of said last-mentioned opening.

i6. A telltale iltting i'or indicating when viscous lubricant supplied to a receiving chamber has reached a predetermined pressure therein, com prising a hollow casing having means for engagement with a source of viscous material and having aldischarge end adapted ior engagement with the receiving chamber to be lubricated,'a tubular element within said casing adapted to receive viscous material from a source under pressure and discharge it into the receiving chamber, the dischargeend of said tubular element being in spaced relation to the discharge end of the casing, which latter provides a chamber around the tubular element adapted to receive a back-now of viscous lliV " material thereinto when the back pressure built 

